300px|thumbnail|right|Columnar rhyolite at Rupnica Rupnica is an outcrop of columnar-jointed rhyolite in Croatia. It lies in the southwest of Voćin. The site used to be a quarry but is now a natural heritage. On 14 October 1948 Rupnica was declared the first natural heritage site of Croatia.
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300px|thumbnail|right|Columnar rhyolite at Rupnica Rupnica is an outcrop of columnar-jointed rhyolite in Croatia. It lies in the southwest of Voćin. The site used to be a quarry but is now a natural heritage. On 14 October 1948 Rupnica was declared the first natural heritage site of Croatia.
==References==
2 mapped locations
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).